Attachment for milling machines



July 22, 1952 F, J. MALNAR 2,604,019

ATTACHMENT FOR MILLING MACHINES Filed Dec. 7,' 1946 s sheets-sheet 1INVENTOR. FRAN K J. MA LNAR.

BY T EYS.

July 22, 1952 F. J. MALVNAR ATTACHMENT FOR MILLING MACHINES 3Shets-Sheet 2 Filed Dec. 7, 1946 INVENToR. FRAN K J, MALNAR.

ATT

July 22, 1952 F. J. MALNAR ATTACHMENT FOR MILLING MACHINES 3Sheets-Sheet 5 Filed Dec. 7, 194e n. V| I|III\NL; VI

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lflf Q \N Patented yJuly 22, 1952A This invention pertainsjto machinetools and more, specifically 'to an improvement in vertical millingmachines.

Anobject offtheinvention isto provide `a horizo'ntal spindle millingvattachment 'for' use with vertical milling machines.

A further object of the invention is to provide a horizontal spindle foruse incombin'ationwith vertical-"spindle milling machines which mayv bereadily incorporated into, Vthe vertical machine.

Another object of 'thefinvention is to provide an auXiliarys'pindle in abolster block or raising blockfjwhi'ch may be" 'interposed'between thecolumn and !spindle'j'head of fa vertical lmilling O'ther vobjectsand'a'dvantag'e'sfmore for less ancillary to jthe A'foregoing andtliemanner in which 'all the various objects arefr'ealized will appearin the following description," whichycon'- sidered in 'connectionv"with" the accompanying drawings, sets' forth' the Vprefferri'sd'Le'nb'odiment ofthe invention.

Referring 'to vthe drawings,

Fig. 1 is an elevation of a milling machine incorporating the invention;

Fig'. vZ'jis 'a horizontal section of the raising block and spindletaken onthe planelin'dicat'ed by the1iiiej2g2inFign Fig. V3 is ahorizontal section of the'milling' machine 'takenon the plane indicated'bythe line 31;3 inFigl;

Fig. `lis a partial vertical section of 'the invention taken on theplane indicated'by tlieline `4-4 inFg.3; and

Fig.'5'is a partialve'rtical section of the milling machine taken on theplaneindicated by the line S-EinFgHZ. Y By-,Way of rexample, theinvention is 2illustrated herein as incorporated in a vertical-spindlemilling machine o f .known vtype disclosed in U. S. Patent 1\To.`2,2"75,2'91 issued March 3, i942 to R. F. Bannow; This machinecomprisesthe usual base HL'colum'n ll, knee i2, and workft'able {SiandanFank semaines-insana, ohio,` s'ssigor fw The f fflMa/lnar-Machine y9.aTool Company, Inc., Clevel g l land, Ohio,` a corporation 'of Ohio v jjiigiiliieanaanetnitr 7, measial No. 714,836 f1 I 3 Claims'. (CL-90L17)templatesfthe provision of a' bolster which may beinstalled'in themachine in theA same Ymanner asV the usual raising block and which isprovided with ahorizontal spindle which may be employed for milling,drilling or 'other machining operations. The invention also involves'the installation of an auxiliary motor to furnish power to thehorizontal spindle. More specically, referring to Figs. 1 and 3, abolster 2| is adapted for mounting on the column Il in place of the headl5, the head then being mounted on the bolster. A horizontal spindle 22mounted in antiiriction bearings in the bolster isfor'medvfor thereceptionv of 'themilling' cutter or other tool 23 projectingv above thework table I3. A bracket 24 bolted or yotherwise secured to the columnsupports a lmotor 25 provided with a multiplestep V-belt pulley-26`whic'h drives a similar pulley 21 on the horizontal spindle bymeansl of a belt 28. i

The detailsof the invention are shown more 'particularly in Figs. 2, 4,and 5. Thebolster 2|, which lmay -be a machined casting, is ofcylindrical form with inwardly-directed upper and lower flanges 3l and32, respectively, for engagement with the head and pedestal. The bolsteris strengthened by internal-ribs 33 and 34 and by thicker wall sections35 which serve to receive the spindle bearings as well as to strengthenVthe bolster.

Thesize of thegbols'ter and the conformation of the upper 'Tand lower-faces-may, of course, be adapted to the construction of any particularmachine-in'which it is 'to be used. Spe'cically, for .the type ofmilling machine disclosed herein,

Atheupper and lower faces vof the block are mabearing 31 of vthe head.VThe lower flange 32 is arm I4 rotatable yabout a horizontal axis withina head l5 which4 maybefmountedi on top ofthe pedestaldl for rotationabout a Vertical axis. The 'ends I6 of the armarfinilled withuppr andlower nat'surface's 'and 'are adapted for' the formed with a dependingpilot bearing 38 machined for rotative engagement within the centralbore 39 of thetop ofv the column. Y The head and bolster arefretained'onthe column by holding-down bolts 4l, the :heads of which are -receivedin a circular T-slot .'42 in themilling ma- .,LV ,V"., A hollow tube,the bore 46 of which is enlarged at one end to provide a conventionaltaper socket 41 for the reception of a tool shank or collet. The spindleis mounted within a clearance hole 49 in the portions 35 of the bolsterblock wall. and may be supported in any conventional manner, preferablyby tapered roller bearings. One form of mounting illustrated hereininvolves two tapered roller bearings (Fig. 4), the outer races of whichare pressed into counterbores 52. The

inner race of the inboard bearing bears against Y Y a washer 53 fittedagainst a ange 51 at theend of the spindle. The inner race of theoutboard bearing is retained by a threaded collar 59,; by means of whichthe bearing clearances may be adjusted. The multiple pulley 21, whichmaybe of conventional construction and be keyed to the shaft 22 in theusual manner,Y is held in place by a nut 62 which compresses it againsta shoulder 63. i

Ringsr55 retained bys'crews 56 shield the Abearings againstforeignmatter. Anyconventional means for lubricating thebearings vmay beprovided. Y

The bolster is provided with an index 64 (Fig. 4) cooperating with thescale 65 on the head and may be provided with a similar index 66 toinsure alignmentof the spindle 22 transversely of the Work table whenthe block 2| is installed on the column. Y n K Although the foregoingdescription is necessarily of ardetailed character, in order that theinvention maybe lcompletely set forth, it is to be understood that thespecic terminology is not intended to ,be restrictive or confining, andthat various rearrangements ofparts ,and modificationsof detail may beresorted to ,without departing from the scope or spirit of the inventionas herein claimedj I claim: n, y l. In a machine tool, in combination, abase comprising 4a columnar member having a .vertical axis and an uppersurface thereof kdefining a plane of rotation normal to said axis, aspindle block mounted for rotation` onsaid upper surface and including alower surface for engaging said upper surface, complementary annularprojection and recess means on said block andsaid basel member forYconstraining the block to rotate'about the vertical axis relative tosaid base member, and the block Vhaving an upper surface defining aplane of rotation normal to the verticalaxis of the base member,` aYwork head mounted on said spindle block and having a lower surfaceengaging the upper surface of a spindle block, the spindle block beingrotatable with respect. to :said Work head, the spindle block and workhead including complementary annular Aprojection and recess means forconstraining the work head to rotate about the vertical axisof the basemember, said work head having a rst spindle and a rst drivingmotorvconnected to said rst spindle for driving'said spindle, a secondspindle extending diametrically through the lspindleblock and mountedforrotation therein,,and a' second drive motor connected to said secondspindle for driving said spindle, Y

2- Ina machine tool, in combination, a base comprising a columnar memberhaving a vertical axis and an upper surface thereof defining a plane ofrotation normal to said axis, a spindle block mounted for rotation onsaid upper surface and including a lower surface for engaging said uppersurface, complementary annular projection and recess means on saidblock` and said base member for constraining the block to rotate aboutthevertical axisrrelative to said base member, and the blockhaving, anupper surface defining a plane of rotation normal to the vertical axisof the base member, a work head mounted on said spindle block and havinga lower surface engaging Y the upper surface of a spindle l block, ,thespindle block being rotatable with re- 15 workhead includingcomplementary annular projection and recess means'for constraining thespectjtomsaid work head, the spindle block and work head to rotate aboutthe vertical axis of thebase member, said work head having a firstspindle and a iirst driving motor connected to said first spindlefordriving said spindle, means extending between said base member andsaid work member for constraining said work'head relative to said basemember, a second spindle extending diametrically through .thev spindleblock and mounted vfor rotation therein, and a second drive motorconnected to said second spindle for drivingsaid spindle.I

3. I'n a machine tool, in combination, a bA se comprising a 4columnarmember having a vertical axis and an upper surface thereof defining aplane of rotation normal to said axis, a spindle block mounted for'rotation on said upper surface and including a' lower surface for'engaginglsaid upper surface, complementary annular projection and recessmeanson said block and said base member for constraining the block torotate about the vertical. axis relative to said base member, and theblock having an upper surface defining a plane of vrotation normal tothe vertical axis of the basemeinber,` a work head mounted on saidspindle block and having a lower surface engag-y ing the upper surfaceof a spindle block, the spindle block being rotatable with respect tosaid work' head, the spindle block and work head including complementaryannular projection and recess means for constraining the work head torotate about the vertical axis of the base member, meansextendingthrough'said spindle block between'said base memberfand said workA headfor constraining said work head relative to said base member, andopenings in said block member for passage of said constraining means topermit rotation of the spindle block.

J. MALNAR.

REFERENCESl CITED The following' referencesare of record in the fileof'this patent:

VGermanyv Sept. k20, 1938

